Last fall, Modos debuted the Paper Monitor and Dev Kit , an open-source e-paper display kit that hit a record 75-hertz refresh rate. The project was successful, raising almost double its US $110,000 goal. Now the two-person startup is back fundraising for Modos Flow, a 13.3-inch color e-paper monitor with a higher native resolution of 3,200 x 2,400, touch input, and a 60-Hz refresh rate, which is made possible by a new display controller called Enchanter. With the Flow’s crowdfunding campaign now live on Crowd Supply , cofounders Alexander Soto and Wenting Zhang spoke with IEEE Spectrum about the engineering behind it and the lessons they’ve learned on their crowdfunding journey. This conversation has been edited and condensed for clarity. What is the Modos Flow, and how does it improve on the Paper Monitor Dev Kit? Wenting Zhang: The previous Paper Dev Kit is a DIY kit. You get the screen and the board, but nothing else. You add your own shell or embed it in another project.…